For steps on making an option required, please follow these steps:
- From within your Product Options app, select Options from the top navigation bar.
- Edit the option set you'd like to adjust.
- Select the Required checkbox next to the option you want to make required, then Save Option Set once you're done.
When this is set, if a customer attempts to add a product to their cart without choosing an option, a message will display letting them know that the option is required.